The women, Olivia Edginton, Lydia Buckler, and Ingvild Marstein Olsen, are students and roommates at Trinity Laban Conservatoire of Music & Dance in London. 

And it has taken off with more and more tourists taking them up on the challenge and doing their own topless photos and posting them on the group page and elsewhere.

The page has nearly 20,000 likes and counting. The purpose, per the ladies is to unite the “people across the globe to feel the freedom and share their beauty with the world”….I guess one bra-less woman at a time! ha!